Introducing the Original Series characters, this set also added Tribble and Trouble cards and brought back the ultra-rare rarity. From this point, every set would have one ultra-rare card. Gameplay ideas introduced in this set mostly became viable only with the next set, but the Federation was strategically strengthened because of the lack of alien races in the Star Trek timeline. Klingons also gained some ground. 131 cards plus 26 Starter Alternate Image Reprint cards (with tribbles) and 68 further reprint cards (with alternate Copy Right).